Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hydrogenation catalyst using cellular titanium dioxide as carrier and preparation method thereof

A hydrogenation catalyst, titanium dioxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, organic compound preparation, physical/chemical process catalyst, etc., can solve the problem of unsatisfactory impregnation depth of active metal, active metal dispersion problems such as poor shedding rate and low shedding rate, to achieve the effect of low shedding rate, high degree of bonding and lower shedding rate

Active Publication Date: 2012-08-08
CHINA PETROLEUM & CHEM CORP +1
View PDF8 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Pd / TiO for the crude terephthalic acid hydrorefining process in the prior art 2 The catalyst has the disadvantages of unsatisfactory impregnation depth of active metal and poor dispersion of active metal. One of the purposes of the present invention is to provide a hydrogenation catalyst with honeycomb titanium dioxide as the carrier, and control the activity by controlling the coating thickness of the honeycomb titanium dioxide carrier. Metal impregnation depth; the second purpose of the present invention is to provide a high degree of bonding between the coating and the honeycomb carrier, and the preparation method of a hydrogenation catalyst with honeycomb titanium dioxide as a carrier with a low shedding rate

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydrogenation catalyst using cellular titanium dioxide as carrier and preparation method thereof
  • Hydrogenation catalyst using cellular titanium dioxide as carrier and preparation method thereof
  • Hydrogenation catalyst using cellular titanium dioxide as carrier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The honeycomb titania carrier was sintered at 1050 °C to reduce the specific surface area to 0.5 m 2 / g, and then pickled with 1 mol / L dilute nitric acid for 2 h to remove the ash and impurities on the surface of the carrier, washed with deionized water until neutral, immersed in a solution of 5% polyethylene glycol, at 120 °C Dry for 5 h for later use;

[0047] (2) Add nano-sized titanium hydroxide and glucose into deionized water, add nitric acid dropwise during stirring to adjust the pH value, and obtain a transparent sol with a pH value of 1. The content of nanoscale titanium hydroxide in the described sol is 10%, and the content of glucose is 5%;

[0048] (3) Immerse the honeycomb titanium dioxide carrier obtained in step (1) in the sol of step (2) for 0.5 h, remove the residual liquid in the channel after taking it out, dry it at 70 °C for 2 h, repeat the dipping and drying 3 times as needed, Until the required coating load is reached, then baked under a nit...

Embodiment 2

[0054] (1) The honeycomb titania carrier was sintered at 950 °C to reduce the specific surface area to 1 m 2 / g, then pickled with 1 mol / L dilute nitric acid for 2 h to remove ash and impurities on the surface of the carrier, washed with deionized water until neutral, immersed in a solution of 1% polyvinyl alcohol, and dried at 120 °C 5 h standby;

[0055] (2) Add nano-sized titanium hydroxide and sucrose into deionized water, add nitric acid dropwise during stirring to adjust the pH value, and obtain a transparent sol with a pH value of 5. The content of nanoscale titanium hydroxide in the described sol is 1%, and the content of sucrose is 1%;

[0056] (3) Immerse the honeycomb titanium dioxide carrier obtained in step (1) in the sol of step (2) for 0.1 h, remove the residual liquid in the channel after taking it out, dry it at 50 °C for 5 h, repeat the dipping and drying 10 times as needed, Until the required coating load is reached, then it is fired at 300 °C under nitrog...

Embodiment 3

[0062] (1) The honeycomb titania carrier was sintered at 1250 °C to reduce the specific surface area to 0.01 m 2 / g, then pickled with 1 mol / L dilute nitric acid for 2 h to remove ash and impurities on the surface of the carrier, washed with deionized water until neutral, immersed in a solution of 10% glycerol, and dried at 120 °C 5 h standby;

[0063] (2) Add nano-scale titanium hydroxide and maltose into deionized water, add nitric acid dropwise during stirring to adjust the pH value, and obtain a transparent sol with a pH value of 0.5. The content of nanoscale titanium hydroxide in the described sol is 20%, and the content of maltose is 10%;

[0064] (3) Immerse the honeycomb titania carrier obtained in step (1) in the sol of step (2) for 1 h, remove the residual liquid in the pores after taking it out, dry it at 120 °C for 1 h, repeat the dipping and drying once as needed, Until the required coating load is reached, then baked at 500 °C under a nitrogen atmosphere to obt...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a hydrogenation catalyst using a cellular titanium dioxide as a carrier and a preparation method thereof. The catalyst is characterized by comprising cellular titanium dioxide carrier, TiO2-C composite coating and precious metal Pd. The TiO2-C composite coating has a thickness of 1-100 mum, a load of 1-10% of the weight of the cellular titanium dioxide carrier and an abscission rate no more than 3%. The precious metal Pd has a load of 0.1-1% of the weight of the cellular titanium dioxide carrier and a load depth of 1-100 muM. Compared with a prior art, the invention has the following advantages: first, the TiO2-C composite coating has high adhesion rate with cellular titanium dioxide carrier, and has smooth coating surface, no crack and low coating abscission rate; second, immersion depth of the precious metal Pd can be effectively regulated by controlling the thickness of the TiO2-C composite coating; and third, the catalyst has the advantages of simple preparation technology, good hydrogenation performance and suitability for industrialized production. The hydrogenation catalyst of the invention is suitable to be used as a hydrogenation catalyst for aromatic aldehydes like crude terephthalic acid or p-carboxy benzaldehyde.

Description

technical field [0001] The invention relates to a hydrogenation catalyst with honeycomb titanium dioxide as a carrier and a preparation method, in particular to a hydrogenation catalyst with honeycomb titanium dioxide as a carrier and a preparation method for hydrogenation and refining of aromatic aldehydes such as crude terephthalic acid or p-carboxybenzaldehyde. Background technique [0002] Purified terephthalic acid (PTA) is a very important organic chemical raw material, and its downstream processing products are mainly polyester fibers, polyester films, packaging bottles and PET engineering plastics. In the crude terephthalic acid (CTA) produced by the liquid-phase oxidation of p-xylene (PX), it generally contains 2000-3000 μg / g of p-carboxybenzaldehyde (4-CBA), the main impurity, because its aldehyde group is relatively active , which will affect the color of polyester fiber, it is necessary to convert 4-CBA into p-toluic acid, which is easily soluble in hot water, by...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J35/10C07C63/26C07C51/487
Inventor 王继元堵文斌卞伯同林陵曾崇余许建文陈韶辉杨爱武柏基业
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com